What is Ivanising?

[bigbluebear]

Thanks Mike, not that I don't trust my mechanic but checked the old needles and they were SD-130 but looked at the jets and they were two different part numbers, I thought he maybe forgot to replace two of them. I did some checking with SG Motorsports and Ivans are 122.5 for the four of them.....anyone know why the old jets are two different sized and Ivans are all the same.